import 'package:flutter/material.dart';

class ConstrainedApp extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('ConstrainedApp'),
      ),
      body: ConstrainedBox(
        constraints: BoxConstraints(
          minHeight: 100
        ),
        child: Container(
          color: Colors.red,
          child: Text('ConstrainedApp'),
        ),
      ),
    );
  }

}